The fish smells _______;you’d better throw it away .

 It’s _____ to teach a man fishing than to give him fish.

If you are careful enough, you will _________ make mistakes in your exams.

It’s ________ of Chen Guangbiao(陈光标) to donate 100,000,000 yuan to people in debris disaster areas(泥石流灾区) in Taiwan. I think he is one of the best philanthropists(慈善家) in the world.

       he explained ,         we understood .